Mashables : Types of Mashable Information Sources : Database Mashables : Arbitrary SQL Queries for Database Mashables : Built-in Finders for Arbitrary Queries
Built-in Finders for Arbitrary Queries
Database mashables can include these built-in operations to handle arbitrary SQL queries for a single table or view:
*findtable-nameByWhereClause:
*Accepts a parameter with the SQL code for a WHERE clause which can contain dynamic parameters (as ?). This can also include an ORDER BY clause at the end.
For example: "LAST_NAME LIKE ? AND DEPT_NO = ?"
*Accepts a second parameter with a string containing the values for all dynamic parameters in the WHERE clause. Parameters are separated by commas. They must be simple values that cannot contain commas.
For example: "L%,1020"
*Uses a prepared statement and thus has no risk of SQL injection attacks.
*Returns all columns defined for the mashable.
*findtable-nameWhere:
*Accepts a parameter with the SQL code for a fully-specified WHERE clause. This can also include an ORDER BY clause at the end.
*Should be used only by users familiar with the database schema as parameters use the database SQL names for columns rather than mashable names.
*Executes raw SQL and thus is vulnerable to SQL injection attacks.
*Returns all columns defined for the mashable.
*selecttable-name
*Accepts a parameter with the SQL code for a SELECT statement for the specific table. You cannot specify other table names.
For example: "EMPLOYEE_ID, FIRST_NAME, EMAIL"
*Accepts a parameter with the SQL code for a fully-specified WHERE clause.
For example: "FIRST_NAME LIKE 'L%'"
*Should be used only by users familiar with the database schema as parameters use the database SQL names for columns rather than mashable names.
*Executes raw SQL and thus is vulnerable to SQL injection attacks.
*Can select specific columns from those defined for the mashable.
*Can sort results.
By default, findtable-nameWhere and selecttable-nameare not enabled when you register a database mashable. Presto administrators can disable both these operations or enable them by default individually.
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